Where decking contributes to the sound insulation of a floor, the thicknesses listed in this chapter should be checked.
|Floor decking||400mm joist centres||450mm joist centres||600mm joist centres||Standard|
|Softwood boarding||16||16||19||BS EN 13353|
|Moisture resistant chipboard||18||18||22||BS EN 312 – type P5|
|Plywood||15||15||18/19||BS EN 636|
|Oriented strand board||15||15||18/19||BS EN 300 – type OSB3|
Square edged boards and boards with loose tongues
When fixing boards with square edges or loose tongues, they should be supported on all sides by joists or noggings.
Tongued and grooved boards
Oriented strand board flooring
Nails for fixing plywood should be in accordance with Table 8.
|Plain wire nails (mm)||Annular ring shank nails (mm)|
Where timber decking is to be installed before the home is watertight, the manufacturer should confirm suitability.
Floors should not be overloaded, especially with materials during construction, and be protected against damp, plaster splashes and other damage.
Technical Extra 10 - Code of practice for the safe installation of precast concrete flooring and associated components
Technical Guidance - Lateral restraint straps to beam and block and precast or prestressed intermediate floors
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